crusher operating work index calculation

crusher operating work index calculation

Crushing work index Calculation - Crushing, Screening ...

As Alex told you: The crushing work index you calculated appears mostly correct. The only correction factor that might affect the calculation is to correct for the efficiency of the motor -- the work index is based on motor output (pinion) power, whereas the measurement of motor power is usually based on motor input power.

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Bond Impact Crushing Work Index -Procedure and Table of ...

Jun 16, 2015  Sizing a crusher can be done reliably calculated thanks to the Impact/Crushing Work Index and the testwork research done by Fred Chester Bond and his 1952 paper. According to Bond’s Third Theory of Comminution, the work/energy input is proportional to the new crack tip length created during particle breakage and equivalent to the work represented by the product – the feed.

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USING THE SMC TEST® TO PREDICT COMMINUTION CIRCUIT

= 1.0 for all crushers operating in closed circuit with a classifying screen. If the crusher is in open circuit, eg pebble crusher in a AG/SAG circuit, K. 2. takes the value of 1.19. x. 1 = P. 80. in microns of the circuit feed . x. 2 = P. 80. in microns of the circuit product . M. ic = Crushing ore work index and is provided directly by SMC ...

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Bond Work Index - an overview ScienceDirect Topics

The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is the kWh/t required to grind to that size. Magdalinovic [38] measured the Bond work index of three ore types using different test screen sizes. He produced a correlation between the mass of test screen undersize per revolution, G, and ...

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calculate crushing efficiency of crushers

Keywords: Bone, Crushing, Grinding, Hammers, Machine, Noise, Operation8.76 Мб. plate rod and (vi) low crushing efficiency (below 47 %).J calculated 1C= 3.142, N2= 1450 rev/min and T as 14.8Nm rev/min The diameter of the pulley on the crusher shaft as given by Allen and Alfred (1998) 'I .!

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Bond Impact Crushing Work Index Testing Machine - Pendulum ...

Safe two-hand operating buttons; The Bond Crushing Work Index (CWI) describes the competency of the ore at larger particle sizes. It is used for the calculation of the actual crusher power requirements. Pendulum mounted hammers with scale.-Test: At least

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how to calculate crusher work inde

How To Calculate Crusher Work Index Evert Bioenergie. Crusher work index infographicsdesignernl calculate crusher power from work index chapter 3 particle technology size reduction calculate crusher power from work index,an ideal crusher would 1 have a large capacity 2 require a small power input per unit of product and 3 yield a, the work index, wi, is defined as the gross energy

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calculate crushing efficiency of crushers

Efficiency is a measure of how much more work must be put into a machine than you get out of the machine.»» hammer crushers generalized formula for efficiency calculation. » crushing and screening machines prices. ... ball mill efficiency calculations - Crusher Price. Work Index Efficiency To calculate the operating .Promoting Ball Mill ...

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USING THE SMC TEST® TO PREDICT COMMINUTION

= 1.0 for all crushers operating in closed circuit with a classifying screen. If the crusher is in open circuit, eg pebble crusher in a AG/SAG circuit, K. 2. takes the value of 1.19. x. 1 = P. 80. in microns of the circuit feed . x. 2 = P. 80. in microns of the circuit product . M. ic = Crushing ore work index and is provided directly by SMC ...

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data of crusher work index - charlyshop.ch

how to calculate crusher work index. ... Operating Work Index For Cone Crusher Amp Terms Work Index illustrate how work index data can be used the ore work index and crusher capacity... Know More. Impact Crushing Work Index.

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Design, Fabrication and Testing of a Double Roll Crusher

work index, capacity and the reduction ratio. Adopting Gupta and Yan [5] the power is given by, P = Q.R d.w i where Q = crushing capacity, Rd = reduction ratio (x 1 /x 2) and wi = work index. In this work Q = .356 t/hr and x 1 = 7.5mm. A roll gap of 5mm had already

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(PDF) A quick method for bond work index approximate value ...

The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial ...

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Using the Bond work index to measure operating comminution ...

Nov 01, 1998  Rowland, C.A., 1978, “Determination and use of operating work indices in controlled grinding circuits–A proposed concept,” Mill Operator’s Conference and Exhibit, Northwestern Branch, Australasian Institution of Mining and Metallurgy, Mt. Isa, Queensland Australia, June. Google Scholar

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Bond Work Index - an overview ScienceDirect Topics

The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is the kWh/t required to grind to that size. Magdalinovic [38] measured the Bond work index of three ore types using different test screen sizes. He produced a correlation between the mass of test screen undersize per revolution, G, and ...

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QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

comminution plants designing. Determining the Bond work index value is quite complicated, time-consuming and requires trained operating personnel and therefore is subjected to errors. A quick method for the Bond work index approximate value determination, which is based on the first order grinding kinetics, is presented in this paper.

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Equipment Sizing: Crusher or Grinding Mill

Jul 08, 2016  UNTIL THE THIRD THEORY OF COMMINUTION of “Work Index” method of determining crushing and grinding mill size was introduced, there was no way of accurately figuring the most applicable, most economical size of crushing and grinding mill. Naturally, with little or no factual operating data correlated in useful form, it was easy enough, even for the most experienced, to arrive

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Power Calculation Of Impact Coal Crusher Based On Bond ...

bond 26 2339 3 s rod mill for work index. 19.0 MINERAL RESOURCE AND . Table 18.3: Bond Crushing work index Results . power calculation of impact coal crusher based on bond work ...

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AMIT 135: Lesson 5 Crushing – Mining Mill Operator Training

Calculation of reduction ratio in crushing [image: (135-5-3)] Crushing Equipment The selection of the right crushing equipment is influenced by many factors some of which are upstream of the crushing plant (e.g. blasting pattern and mining method) and others which are downstream of the crushing plant (e.g. mill and grinding circuit selection).

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Crushing of coal and calculation of size reduction efficiency.

Feb 25, 2015  Bond Work Index 𝑤 = 10𝑊𝑖 1 𝑝 − 1 𝑓 W = Power required in KWH to crush 1 short tonne ( 2000 pound) of material Wi is the work index of the material p is the 80 % passing size of the product f is the 80 % passing size of the feed 2/25/2015 6:58:05 AM 23 24.

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crusher operating work index calculation

The rod mill work index is computed with an equation very similar to that of the crusher work index (CWI) or impact work .. of operating pressure and moisture. In general, the impact or crushing work indices (CWi) calculated from test work . crushing and other operating

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Bond Work Index Tests - Grinding Solutions Ltd

The Bond Low-Energy Impact test can be used to determine the Crusher Work index (CWi), also known as the Impact Work Index. The test determines the impact energy at which a specimen fails and allows approximation of net power requirements for sizing crushers. The open and closed sized settings for given product sizes can also be determined.

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A Method of C alculating Autogenous/ Semi-Autogenous ...

The operating fi work index, though, is in the range of 21 kWh/t to 25 kWh/t showing high ineffi ciency. This raises the point that, in some cases, the Bond EF4 oversize factor calculation is not suf cient to compensate fi for the milling inef ciencies that arise. This can result in fi the mill being undersized. To counter this problem it ...

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Bond Work Index - an overview ScienceDirect Topics

The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is the kWh/t required to grind to that size. Magdalinovic [38] measured the Bond work index of three ore types using different test screen sizes. He produced a correlation between the mass of test screen undersize per revolution, G, and ...

Read More
data of crusher work index - charlyshop.ch

how to calculate crusher work index. ... Operating Work Index For Cone Crusher Amp Terms Work Index illustrate how work index data can be used the ore work index and crusher capacity... Know More. Impact Crushing Work Index.

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20150821 Morrell Method-GMG-ICE-v01-r01 Morrell method

Mic Ore work index in crusher circuits (kWh/t) Mih Ore work index in HPGR circuits (kWh/t) P100 100% passing size or closing screen aperture (µm) P80 80% passing size of the circuit product (µm) SABC Semi-Autogenous-Ball-Milling-Crushing SAG Semi-Autogenous Grinding x1–x3 Generic terms for P80 W Specific energy (work) input (kWh/t)

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Design, Fabrication and Testing of a Double Roll Crusher

work index, capacity and the reduction ratio. Adopting Gupta and Yan [5] the power is given by, P = Q.R d.w i where Q = crushing capacity, Rd = reduction ratio (x 1 /x 2) and wi = work index. In this work Q = .356 t/hr and x 1 = 7.5mm. A roll gap of 5mm had already

Read More
AMIT 135: Lesson 5 Crushing – Mining Mill Operator Training

Calculation of reduction ratio in crushing [image: (135-5-3)] Crushing Equipment The selection of the right crushing equipment is influenced by many factors some of which are upstream of the crushing plant (e.g. blasting pattern and mining method) and others which are downstream of the crushing plant (e.g. mill and grinding circuit selection).

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AMIT 135: Lesson 6 Grinding Circuit – Mining Mill Operator ...

Operating data from existing mill circuit (direct proportioning) . Grinding tests in pilot scale, where the specific power consumption is determined (kWh/t dry solids) . Laboratory tests in small batch mills to determine the specific energy consumption. Energy and power calculations based on Bonds Work Index (Wi, normally expressed in kWh ...

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Tubular Rod Mills - ScienceDirect

Jan 01, 2016  The work index of the material to be ground was estimated in a laboratory as 12.8 kWh/t. The feed to the mill was from a secondary cone crusher, 80% of which passed a 3500 μm sieve. The 80% passing size of the product was required to be 75 μm at a fraction of critical speed of 0.7.

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INTRODUCTION TO MINERAL PROCESSING ... - Academia.edu

INTRODUCTION TO MINERAL PROCESSING FLOWSHEET DESIGN f Introduction • The flowsheet shows diagrammatically the sequence of operations in the plant. • Most flowsheets use symbols to represent the unit operations • The flowsheet is the “road-map” of a process, • It serves to identify and focus the scope of the process for all ...

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Crushing of coal and calculation of size reduction efficiency.

Feb 25, 2015  Bond Work Index 𝑤 = 10𝑊𝑖 1 𝑝 − 1 𝑓 W = Power required in KWH to crush 1 short tonne ( 2000 pound) of material Wi is the work index of the material p is the 80 % passing size of the product f is the 80 % passing size of the feed 2/25/2015 6:58:05 AM 23 24.

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4. Size reduction problems Questions _2020 batch.docx ...

The work index for limestone is 12.74 kw-hr/ton (Answer: ... Calculate the operating speed of the ball mill from the data given below. ... A certain crusher takes rock whose average particle diameter is 0.025 m and crusher is to give a product whose average particle

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(PDF) Cone Crusher Performance - ResearchGate

May 13, 2015  The basic operating principle of a cone crusher is shown in Figure 4. The properties, i.e. size distribution and quality parameters, of the product leaving the crusher are a result of the

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